Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural
sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS
Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing
UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

The response of broiler chickens on supplemented diets with Avilamycin (10 mg kg-1) or mannanoligosaccharides 1.0 or 2.0 / 1.0 / 0.5 g kg-1 analysed on basic of performance, carcass quality, number of microorganisms in jejunum and caecum content, was determined. The performance results by antibiotic and mannanoligosaccharides (MOS) supplementation of diets were comparable. Reduced number of intestinal pathogenic microflora (E. coli, Clostridium perfringens) was visible (p<0.05) in chickens from MOS (2.0 / 1.0 / 0.5 g kg-1) group in comparisons to control animals. The highest number of Lactobacillus spp. in intestine content was observed in antibiotic group.